|
public static CreateFunction ( JsNativeFunction function ) : |
||
| function | JsNativeFunction | The method to call when the function is invoked |
| return | ||
private EmbeddedObject CreateEmbeddedFunction(Delegate del)
{
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
#if NET40
MethodInfo method = del.Method;
#else
MethodInfo method = del.GetMethodInfo();
#endif
ParameterInfo[] parameters = method.GetParameters();
object[] processedArgs = GetHostItemMemberArguments(args, parameters.Length);
ReflectionHelpers.FixArgumentTypes(ref processedArgs, parameters);
object result;
try
{
result = del.DynamicInvoke(processedArgs);
}
catch (Exception e)
{
JsValue undefinedValue = JsValue.Undefined;
Exception exception = UnwrapException(e);
var wrapperException = exception as WrapperException;
JsValue errorValue = wrapperException != null?
CreateErrorFromWrapperException(wrapperException)
:
JsErrorHelpers.CreateError(string.Format(
Strings.Runtime_HostDelegateInvocationFailed, exception.Message))
;
JsContext.SetException(errorValue);
return(undefinedValue);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
GCHandle delHandle = GCHandle.Alloc(del);
IntPtr delPtr = GCHandle.ToIntPtr(delHandle);
JsValue objValue = JsValue.CreateExternalObject(delPtr, _embeddedObjectFinalizeCallback);
JsValue functionValue = JsValue.CreateFunction(nativeFunction);
SetNonEnumerableProperty(functionValue, ExternalObjectPropertyName, objValue);
var embeddedObject = new EmbeddedObject(del, functionValue,
new List <JsNativeFunction> {
nativeFunction
});
return(embeddedObject);
}
private void ProjectMethods(EmbeddedItem externalItem)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
bool instance = externalItem.IsInstance;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
IEnumerable <MethodInfo> methods = type.GetMethods(defaultBindingFlags)
.Where(ReflectionHelpers.IsFullyFledgedMethod);
IEnumerable <IGrouping <string, MethodInfo> > methodGroups = methods.GroupBy(m => m.Name);
foreach (IGrouping <string, MethodInfo> methodGroup in methodGroups)
{
string methodName = methodGroup.Key;
MethodInfo[] methodCandidates = methodGroup.ToArray();
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
CreateAndSetTypeError(string.Format(
Strings.Runtime_InvalidThisContextForHostObjectMethod, methodName));
return(JsValue.Undefined);
}
object[] processedArgs = GetHostItemMemberArguments(args);
var bestFitMethod = (MethodInfo)ReflectionHelpers.GetBestFitMethod(
methodCandidates, processedArgs);
if (bestFitMethod == null)
{
CreateAndSetReferenceError(string.Format(
Strings.Runtime_SuitableMethodOfHostObjectNotFound, methodName));
return(JsValue.Undefined);
}
ReflectionHelpers.FixArgumentTypes(ref processedArgs, bestFitMethod.GetParameters());
object result;
try
{
result = bestFitMethod.Invoke(obj, processedArgs);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as WrapperException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
string.Format(Strings.Runtime_HostObjectMethodInvocationFailed, methodName,
exception.Message)
:
string.Format(Strings.Runtime_HostTypeMethodInvocationFailed, methodName, typeName,
exception.Message)
;
errorValue = JsErrorHelpers.CreateError(errorMessage);
}
JsErrorHelpers.SetException(errorValue);
return(JsValue.Undefined);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
nativeFunctions.Add(nativeFunction);
JsValue methodValue = JsValue.CreateFunction(nativeFunction);
typeValue.SetProperty(methodName, methodValue, true);
}
}
private void ProjectProperties(EmbeddedItem externalItem)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
bool instance = externalItem.IsInstance;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
PropertyInfo[] properties = type.GetProperties(defaultBindingFlags);
foreach (PropertyInfo property in properties)
{
string propertyName = property.Name;
JsValue descriptorValue = JsValue.CreateObject();
descriptorValue.SetProperty("enumerable", JsValue.True, true);
if (property.GetGetMethod() != null)
{
JsNativeFunction nativeGetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
CreateAndSetTypeError(string.Format(
Strings.Runtime_InvalidThisContextForHostObjectProperty, propertyName));
return(JsValue.Undefined);
}
object result;
try
{
result = property.GetValue(obj, new object[0]);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as WrapperException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
string.Format(Strings.Runtime_HostObjectPropertyGettingFailed, propertyName,
exception.Message)
:
string.Format(Strings.Runtime_HostTypePropertyGettingFailed, propertyName,
typeName, exception.Message)
;
errorValue = JsErrorHelpers.CreateError(errorMessage);
}
JsErrorHelpers.SetException(errorValue);
return(JsValue.Undefined);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
nativeFunctions.Add(nativeGetFunction);
JsValue getMethodValue = JsValue.CreateFunction(nativeGetFunction);
descriptorValue.SetProperty("get", getMethodValue, true);
}
if (property.GetSetMethod() != null)
{
JsNativeFunction nativeSetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
CreateAndSetTypeError(string.Format(
Strings.Runtime_InvalidThisContextForHostObjectProperty, propertyName));
return(JsValue.Undefined);
}
object value = MapToHostType(args[1]);
ReflectionHelpers.FixPropertyValueType(ref value, property);
try
{
property.SetValue(obj, value, new object[0]);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as WrapperException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
string.Format(Strings.Runtime_HostObjectPropertySettingFailed, propertyName,
exception.Message)
:
string.Format(Strings.Runtime_HostTypePropertySettingFailed, propertyName,
typeName, exception.Message)
;
errorValue = JsErrorHelpers.CreateError(errorMessage);
}
JsErrorHelpers.SetException(errorValue);
return(JsValue.Undefined);
}
return(JsValue.Undefined);
};
nativeFunctions.Add(nativeSetFunction);
JsValue setMethodValue = JsValue.CreateFunction(nativeSetFunction);
descriptorValue.SetProperty("set", setMethodValue, true);
}
typeValue.DefineProperty(propertyName, descriptorValue);
}
}
private EmbeddedType CreateEmbeddedType(Type type)
{
#if NET40
Type typeInfo = type;
#else
TypeInfo typeInfo = type.GetTypeInfo();
#endif
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(true);
ConstructorInfo[] constructors = type.GetConstructors(defaultBindingFlags);
JsNativeFunction nativeConstructorFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
object result;
JsValue resultValue;
object[] processedArgs = GetHostItemMemberArguments(args);
if (processedArgs.Length == 0 && typeInfo.IsValueType)
{
result = Activator.CreateInstance(type);
resultValue = MapToScriptType(result);
return(resultValue);
}
if (constructors.Length == 0)
{
CreateAndSetError(string.Format(Strings.Runtime_HostTypeConstructorNotFound, typeName));
return(JsValue.Undefined);
}
var bestFitConstructor = (ConstructorInfo)ReflectionHelpers.GetBestFitMethod(
constructors, processedArgs);
if (bestFitConstructor == null)
{
CreateAndSetReferenceError(string.Format(
Strings.Runtime_SuitableConstructorOfHostTypeNotFound, typeName));
return(JsValue.Undefined);
}
ReflectionHelpers.FixArgumentTypes(ref processedArgs, bestFitConstructor.GetParameters());
try
{
result = bestFitConstructor.Invoke(processedArgs);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as WrapperException;
JsValue errorValue = wrapperException != null?
CreateErrorFromWrapperException(wrapperException)
:
JsErrorHelpers.CreateError(string.Format(
Strings.Runtime_HostTypeConstructorInvocationFailed, typeName, exception.Message))
;
JsErrorHelpers.SetException(errorValue);
return(JsValue.Undefined);
}
resultValue = MapToScriptType(result);
return(resultValue);
};
GCHandle embeddedTypeHandle = GCHandle.Alloc(type);
IntPtr embeddedTypePtr = GCHandle.ToIntPtr(embeddedTypeHandle);
JsValue objValue = JsValue.CreateExternalObject(embeddedTypePtr, _embeddedTypeFinalizeCallback);
JsValue typeValue = JsValue.CreateFunction(nativeConstructorFunction);
SetNonEnumerableProperty(typeValue, ExternalObjectPropertyName, objValue);
var embeddedType = new EmbeddedType(type, typeValue,
new List <JsNativeFunction> {
nativeConstructorFunction
});
ProjectFields(embeddedType);
ProjectProperties(embeddedType);
ProjectMethods(embeddedType);
FreezeObject(typeValue);
return(embeddedType);
}
private void ProjectFields(EmbeddedItem externalItem)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
bool instance = externalItem.IsInstance;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
FieldInfo[] fields = type.GetFields(defaultBindingFlags);
foreach (FieldInfo field in fields)
{
string fieldName = field.Name;
JsValue descriptorValue = JsValue.CreateObject();
descriptorValue.SetProperty("enumerable", JsValue.True, true);
JsNativeFunction nativeGetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
JsValue undefinedValue = JsValue.Undefined;
JsValue errorValue = JsErrorHelpers.CreateTypeError(
string.Format(Strings.Runtime_InvalidThisContextForHostObjectField, fieldName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
object result;
try
{
result = field.GetValue(obj);
}
catch (Exception e)
{
string errorMessage = instance ?
string.Format(Strings.Runtime_HostObjectFieldGettingFailed, fieldName, e.Message)
:
string.Format(Strings.Runtime_HostTypeFieldGettingFailed, fieldName, typeName, e.Message)
;
JsValue undefinedValue = JsValue.Undefined;
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
nativeFunctions.Add(nativeGetFunction);
JsValue getMethodValue = JsValue.CreateFunction(nativeGetFunction);
descriptorValue.SetProperty("get", getMethodValue, true);
JsNativeFunction nativeSetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
JsValue undefinedValue = JsValue.Undefined;
JsValue errorValue = JsErrorHelpers.CreateTypeError(
string.Format(Strings.Runtime_InvalidThisContextForHostObjectField, fieldName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
object value = MapToHostType(args[1]);
ReflectionHelpers.FixFieldValueType(ref value, field);
try
{
field.SetValue(obj, value);
}
catch (Exception e)
{
string errorMessage = instance ?
string.Format(Strings.Runtime_HostObjectFieldSettingFailed, fieldName, e.Message)
:
string.Format(Strings.Runtime_HostTypeFieldSettingFailed, fieldName, typeName, e.Message)
;
JsValue undefinedValue = JsValue.Undefined;
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
return(JsValue.Undefined);
};
nativeFunctions.Add(nativeSetFunction);
JsValue setMethodValue = JsValue.CreateFunction(nativeSetFunction);
descriptorValue.SetProperty("set", setMethodValue, true);
typeValue.DefineProperty(fieldName, descriptorValue);
}
}
